Verdict from 5.7 hours of research from the internet

93
Great!
717 users: 4.4 / 5
10 experts: 89 / 100

7 reasons to buy

  • The lightweight construction of the Adidas Adizero Boston 8 is welcomed by most consumers.
  • ‘Comfortable’ is a word that many have used to describe their time wearing this product.
  • The Boost™ cushioning unit is welcomed as a responsive underfoot piece for all-day activities.
  • A handful of testers have noted that the forefoot section has a roomy construction that accommodates natural toe-splay.
  • Push-off power is appreciated because the midsole apparently balances firmness and flexibility.
  • The upper unit of this running shoe is considered secure and breathable.
  • The traction provided by the outsole unit is welcomed as it is deemed precise and well-balanced.

2 reasons not to buy

  • A few people have stated that the Adidas Adizero Boston 8 has a stiffness that calls for a few break-in periods.
  • A couple of purchasers have reported some discomfort caused by the padding and shape of the heel collar.

Bottom line

The overall reaction towards the Adidas Adizero Boston 8 has been mostly positive. People consider this running shoe an approachable update for their daily activities. The lightweight structure, comfortable build, spacious toe-box, and traction-ready outsole are highlighted as the best parts of the design. On the other hand, the irritating heel part of the upper and the need for a break-in period make up the negative points.

Fans of road running shoes are the market of the Adidas Adizero Boston 8.

Tip: see the best running shoes.

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Our reviews

90
/100 by Jake Boesch, posted on .

The Adidas Boston Boost 5 was a nearly perfect shoe for me: lightweight, durable, springy, and smooth. I bought multiple pairs and used them for all types of running: long runs, trails, workouts, daily training, and races.

After the Boston Boost 5, I tried versions 6 and 7. However, I did not like them as much as the five, due to their lower heel collar and more sluggish feel.

Now, that I have run 50 miles in the Adidas Adizero Boston 8, I have noticed some durability issues and have a couple of critiques, but I am largely pleased with the shoes’ snappy and do-everything-well capabilities. 

 

Looks

The aesthetic of the Boston 8, especially in my black and white colorway, appears bland and the materials seem cheap. The shoe has big Adidas stripes toward the front and a glossy “BOSTON” imprint on the heels.

 

 

I appreciate simple and subtle uppers; the Boston 8 maintains simplicity but lacks subtly due to the large and bold placement of the three stripes logo.

 

 

Further, the materials used in the previous model seemed to be of higher quality. With the Boston 8, Adidas uses a scratchy, plastic-like mesh that would be fine on $99 shoe but disappoints in the $120 price range.

Fit

The Boston 8 fits true to size and worked with my foot perfectly. It definitely is not as narrow as some of its predecessors and should fit most feet, but it still has a race-oriented snug fit that may be a bit too tight for some runners.

 

 

I did not have any problems with heel slippage and did not have to use the final eyelet, which is good, because the laces do run a little short.

Upper

Even though the upper feels cheap in hand, it performs well during runs.

I was worried that the shoe would not have enough structure around my arch due to the change in placement of the Adidas logo, which wrapped around the foot in previous models, but that did not cause any issues. I felt stable and locked in.

 

 

Additionally, the upper was comfortable. I did not develop any hotspots, have to fidget with the tongue or feel too restricted in any way.

Midsole

The Boost midsole won my heart in the Boston 5. The boost is mostly concentrated in the heel and midfoot. The forefoot contains standard EVA.

This combination leads to a very smooth transition. When your foot lands, whether you strike with your heel or with the ball of your foot, the boost material cushions the impact and bounces you back up.

 

 

Then, the firm and more responsive EVA, in tandem with the plastic torsion piece, helps you quickly turn over to the next stride. After 50 miles, the midsole has held up well and feels just as lively as it did during the first mile. The midsole makes the Boston 8 a very versatile shoe.

The Boost and EVA material provide enough cushioning that I was comfortable on longer runs and its ability to transition smoothly and quickly made it easy for me to pick up the pace during a couple of fartlek workouts.

The Boston 8 maintains its standing as one of the rare shoes that feel fast during a 5k and reliable enough to eat up the daily miles.

Outsole

The Continental Rubber Outsole performed very well. I had good traction on pavement that helped me maintain a quick turnover.

I did not slip at all in the rain, even when I ran over metal or other slick surfaces. And on trails, mulch, and gravel my feet felt protected and gripped the terrain nicely.

 

 

However, I am not sure how it holds up with regard to durability. After 50 miles, I have already noticed some worn areas on the outsole. Particularly, there’s a tear in the rubber at midfoot on the right shoe.

This could be my fault–maybe I stepped on some grass or a sharp rock–but it’s worth mentioning. The Continental Rubber is still likely more durable than many competitors that use mostly an EVA outsole (think HOKA, Saucony Kinvara, etc.).

 

Summary

Overall, I enjoy running in the Boston 8 and will keep them in my rotation in the future. The shoe has a simple and race-like feel but can handle the rigors of daily training. The upper performs well but feels cheap in hand.

The midsole provides a smooth transition between strides and adapts to your pace. The Continental Rubber outsole succeeds on any surface.

I would recommend the Adidas Adizero Boston 8 for any runner that wants a lightweight shoe that they can rely on for anything.

Pros

  • Feels light on the foot
  • Simple upper
  • Responsive midsole
  • Soft heel, yet bouncy heel cushioning
  • Versatile

Cons

  • Feels cheap in hand, especially compared to other shoes in the $120 price range
  • Tear in the outsole (could be my fault)
Jake Boesch | Level 3 expert Verified
I have been a runner since middle school and am now in graduate school. I typically cover anywhere from 20-40 miles per week on roads, trails, and occasionally the treadmill. I have competed in several races both local and collegiately, but I've never raced a distance longer than a 10k. However, I'm currently training for the 2018 Philadelphia Marathon.

93
/100 by Elliot Kortenray , posted on .

Adidas-Adizero-Boston-8-running-shoes.jpg

 

The Adizero range has been worn for more world-record runs than any other shoe (until Nike eventually spoils the party) so you know you’re in good hands when you pick up a pair of these and once you’ve got them on, they don’t disappoint. 

From the moment I laced up the Adidas Boston 8s, I could feel that they were fast. They have the ability to make you feel that you’re almost leaning forwards; that they’re pushing you to move and call to the pavement for that next step.

I’ve been looking to get a pair of Bostons for a long time but was always worried about moving over to a neutral shoe, given I’ve previously relied on support shoes. After some time and work, I finally felt confident to buy a pair and they have lived up to my expectations. 

These running shoes are aimed to provide just enough cushioning to push the pace on tempo and longer runs, they provide a lightweight cushioned experience and drive you forward. Some key features are –

  • Lightweight 
  • Continental™ Rubber outsole
  • Boost Midsole 
  • Stabilising Torsion System and energy rail 
  • High energy return

Rotation

To give some context to what I’m comparing the Adidas Adizero Boston 8s with, the shoes I currently switch between are:

  • Nike Pegasus 35 for speedwork and shorter distances 
  • Asics Metarun for races and longer runs 

In the past, I’ve heavily relied upon support shoes but as shown from above, I’m slowly moving towards a lighter support level. My aim is for the Bostons to replace my Metaruns as my race and long-distance running shoes

Fit

The Bostons do slim down quite a lot towards the forefoot. So personally, if I was buying another pair I’d jump up an extra half size just to make sure my toes have enough space to splay whilst running. That being said after breaking the shoes in (the first 15 or 20 miles) they do seem to loosen up a bit and no longer feel as tight on the outside of the foot. 

Other than the fit on the toes, the rest of the shoe fits perfect, I didn’t experience any issues with movement, blisters, or hot spots when wearing them. 

Upper

 

Adidas-Adizero-Boston-8-heel-cup.jpg

 

These are a great looking pair of shoes, they look the part on a start line or in a more casual setting. I went for the black and white version which features a subtle shiny black BOS on the back of the left shoe and TON on the back of the right shoe, a nod to the Adidas logo in white on the outside of each shoe, and the unique boost sole. 

 

 

Adidas-Adizero-Boston-8-mesh-upper.jpg

 

Apart from looks, these shoes feature a mesh upper which ensures your feet stay cool and just-enough approach to their cushioning. I wouldn’t refer to them as plush, by any stretch of the imagination, but they give enough to ensure your feet feel secure (especially with the heel counter) and from my experience, there were no hotspots or areas that caused blisters. 

The one challenge with the just-enough approach is that in order to ensure the shoes are tight enough (especially if like me, you never quite feel that they are), the thin tongue can lead to some pressure on the top foot—not a huge issue as you can just loosen them but as you’ll see throughout, I’m struggling for bad points.  

Midsole

The midsole on the Bostons gives great energy return. It’s firm but has enough, given that you can keep going over long runs and is forgiving if your form starts to give up towards the end. It provides a good amount of bounce but not to the level that you would get from the Pegasus or the Ultra Boosts. It feels much more like a racing shoe made to move fast. 

The midsole provides some basic arch support and the guidance system on the bottom works with this to help keep you aligned through your stride. As someone that does overpronate I could potentially do with a bit more arch support, but I don’t feel it’s necessary, given I will mainly be using these for races and fast runs. 

The Bostons do a great job of providing a good level of cushioning while still making you feel connected to the ground. As you push off of the forefoot you can really feel the snappy lower amount of cushioning towards the front working well with the great grip. I’ll talk about it in the outsole section. 

Outsole 

 

Adidas-Adizero-Boston-8-outsole.jpg

The Continental™ Rubber outsole on the Bostons is truly outstanding. I’ve tried them out on an array of terrains and in different weather conditions and these are truly the first shoe I’ve had full trust in heading around corners at pace or shooting down a steep hill. The rubber also proves great protection and a durable cover for the softer bounce foam, ensuring that these last a decent amount of time. 

Looking at the sole, there are a lot of cool colorful features. The energy rails and support system down the center help keep you moving forward through your stride and give you a bit of color. You’ve got the Continental logo up at the front and as mentioned, above the rubber webbing.

Pros

  • Traction
  • Styling 
  • Energy return
  • Weight 

Cons

  • Narrow toe box 
  • Lacing tightness 

Conclusion 

 

Adidas-Adizero-Boston-8-stack-height.jpg

 

The Bostons are a great shoe in an attractive package. They give great grip, enough support to keep you going on long runs, and yet still fast enough to push you forward during interval training or tempo runs which is a truly impressive balance. There’s a reason that this range of shoes is steeped in world-record prestige and for the price, you can get a pair for they are certainly worth buying for your next race or training plan. 

Would I choose the Bostons again? 

Yes, I’d maybe consider going half a size up from my normal size just to make sure I’ve got enough space for my toes to splay. But overall, these are an amazing pair of running shoes and are a happy addition to my rotation. 

Elliot Kortenray | Level 3 expert Verified
Hello, my name is Elliot. I live in Surrey and I have a passion for fitness whether that’s hitting the gym, going for bike rides or running. I’ve taken part in various races starting out with 10Ks, a few obstacle courses, a half marathon and a couple of marathons. My next challenge is to tackle a triathlon.

  • The Adidas Adizero Boston 8 is a neutral running shoe that’s designed for those who like to take to the roads. This product features a relatively lightweight build to cater to extended running sessions like fun runs, speed training, and contests.
  • The visual aspect of this Adidas running shoe is what mainly sets it apart from its predecessor, the Adizero Boston Boost 7. While a helping of stitched-on overlays graced the sides of the progenitor, a few synthetic prints that are merely stitch-reinforced are the ones that adorn the Boston 8. Such a configuration, along with a minimalist look, makes it lighter than ever.
  • Continental™ rubber still serves as the external pad. This layer now has a redesigned tread-pattern to heighten flexibility on all areas of the platform. Horizontal traction pads ensure grip on the asphalt.

The standard measurements were used in the making of the Adidas Adizero Boston 8. People are encouraged to get a pair using their usual sizing expectations. When it comes to width, the available options are D – Medium and B – Medium for men and women, respectively.

Consumers are generally advised to try on the shoe first before making a purchase decision to achieve an in-shoe experience that is pleasant and form-accommodating.

This road running shoe has a semi-curved shape which allows the naturally curved outline of the human foot to acclimatize well inside the interior compartment.

The outsole unit of the Adidas Adizero Boston 8 features the Continental™ rubber, a compound that’s used for the tires of vehicles. This layer generously surrounds the base of the midsole, shielding it from the debilitating effects of continued use. Horizontal protrusions are responsible for doling out grip over the surfaces.

Flex grooves adorn the external pad. These shallow trenches are designed to make the platform flexible, thereby enabling the natural bending capacity of the foot as it goes through the gait cycle.

Boost™ serves as the base of the Adidas Adizero Boston 8’s cushioning system. This technology is made up of thermoplastic polyurethane (TPU) pellets that have been amalgamated and made into one cohesive piece. The result is a feature that is ready to absorb impact shock and distribute energy back to the foot, giving a reactive ride that lasts. Boost™ is a licensed technology that graces many of Adidas’ popular models, including the Ultra Boost.

The Energy Rail is a top layer that acts as the platform that supports the foot. This foam piece is meant to maintain the structural integrity of the whole midsole, delivering consistent cushioning for the runner.

The Torsion System is a thermoplastic sheet that is placed between the midsole and outsole. This feature prevents the sagging of the midsole while also helping with the quality of the heel-to-toe transitions.

The upper unit of the Adidas Adizero Boston 8 makes use of a multilayered mesh. This material has a light and stretchy build which accommodates the natural shape and motion of the foot. Breathing holes permit environmental air into the interior chamber, thus giving a cool and dry experience.

Thin prints grace the sides, bolstering the structural integrity of the textiles and heightening the foot-security.

The heel part has a stitched-on fabric counter that is also buttressed by printed overlays. This layer is designed to support the back of the foot, staving off in-shoe quivering or accidental shoe removals.

Some stitch-reinforcements motivate the robustness of the sides and the instep. Even the eyelets of the lacing system are bolstered to avert tearing or loosening of the threading.

A traditional lacing system fills the bridge of the silhouette. Flat laces crisscross through discreet eyelets that run from the throat to the collar. These elements adjust the tightness or looseness of the cover system.

Size and fit

True to size based on 61 user votes
Small (14%)
True to size (82%)
Large (2%)
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Same sizing as Adidas Adizero Boston 9.

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Size comments

The Boston 8 fits true to size and worked with my foot perfectly. - Jake Boesch, Level 3 expert
Heel fit
Narrow Wide
Toebox
Tight Roomy

How Adizero Boston 8 compares

This shoe: 93
All shoes average: 86
54 98
This shoe: $120
All shoes average: $119
$40 $350
This shoe: 9oz
All shoes average: 9.5oz
3.5oz 16.2oz
Author
Jens Jakob Andersen
Jens Jakob Andersen

Jens Jakob is a fan of short distances with a 5K PR at 15:58 minutes. Based on 35 million race results, he's among the fastest 0.2% runners. Jens Jakob previously owned a running store, when he was also a competitive runner. His work is regularly featured in The New York Times, Washington Post, BBC and the likes as well as peer-reviewed journals. Finally, he has been a guest on +30 podcasts on running.

jens@runrepeat.com